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What happens during fertilization in hum...

What happens during fertilization in human after many sperms reach close to the ovum?

A

Cells of corona radiate trap all the sperms except one

B

Only two sperms nearest the ovum penetrate zona pellucida

C

Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida

D

All sperms except the one nearest to the ovum lose their tails.

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